InChI=1/C27H18N2O4/c30-24-16-15-18-9-7-8-14-21(18)22(24)17-23-25(31)28(19-10-3-1-4-11-19)27(33)29(26(23)32)20-12-5-2-6-13-20/h1-17,30H 0ADE2F29A45B9EE6